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MM54HCT253 Datasheet(PDF) 3 Page - National Semiconductor (TI) |
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MM54HCT253 Datasheet(HTML) 3 Page - National Semiconductor (TI) |
3 / 4 page AC Electrical Characteristics VCC e 5V TA e 25 C tr e tf e 6 ns CL e 15 pF Symbol Parameter Conditions Typ Units tPHL tPLH Maximum Propagation 23 ns Delay Select A or B to Y tPHL tPLH Maximum Propagation 20 ns Delay any Data to Y tPZH tPZL Maximum Output Enable Time RL e 1k 15 ns Y Output to a Logic Level tPHZ tPLZ Maximum Output Disable Time RL e 1k 11 ns Y Output to High Impedance State AC Electrical Characteristics CL e 50 pF tr e tf e 6 ns (unless otherwise specified) TA e 25 C 74HC 54HC Symbol Parameter Conditions TA eb40 Cto85 CTA e 55 Cto125 C Units Min Typ Max Min Max Min Max tPHL tPLH Maximum Propagation 26 40 50 60 ns Delay Select A or B to Y tPHL tPLH Maximum Propagation 24 35 44 53 ns Delay and Data to Y tPZH tPZL Maximum Output Enable Time RL e 1kX 19 26 33 39 ns tPHZ tPLZ Maximum Output Disable Time RL e 1kX 13 20 25 30 ns tTHL tTLH Maximum Output Rise 8 15 19 22 ns and Fall Time CIN Maximum Input Capacitance 5 10 10 10 pF CPD Power Dissipation (per package) Capacitance (Note 5) Output Enabled 90 pF Outputs Disabled 25 pF Note 5 CPD determines the no load dynamic power consumption PDeCPD VCC 2 faICC VCC and the no load dynamic current consumption ISeCPD VCC faICC Logic Diagram TLF8434 – 2 3 |
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